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Consider the voltage level at the circled node,
if that voltage level is calculated by the
Kirchhoffs voltage law (summing from the 5V rail to the 0V rail)
, but if the node is also connected to the chip, we don't know
what components are available inside that chip, can we assume
Okay, I remember now. The current of a transistor circuit doesn't depend on the DC voltage, but the base current/voltage. So the Ic doesn't depend on Rc.
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Ok, get it, the potential difference all over is 18V with a 0.65V transistor difference. divided by Rc...
Thanks, I understand some of the parts now. The transistor is acting like a diode, but 18V - 0.65V, if the 0.65V is he drop across the transistor, but why not considered Rc which might have a resistance of several Kilo ohms or Mega on its own. if so, the voltage drop across it might be ~17V...
Sorry, I have come back.
In physics, I remember there is one thing called displacement current, where energy stored in magnetic fields are transformed into electric fields in between the cap and transformed back into magnetic fields on the other side of the cap for continuous currents. So my...
I have a 520W power supply for my personal computer appliances.
I used to have a 500W power supply for the the same computer set. If the mains supplies 13A of current, would the 520W power supply draw more energy than the 500W one from the mains to the supply, meanwhile the current is constant...
During the positive cycle, the capacitor will get charged. However, ac current will flow through the cap rather than establishing potential difference between the plates. All the energy should be "dissipated" during that time. That's what I don't understand.
Could anyone please recommend some books on such topic?
Some circuits may contain a lot of nodes and branches in various configurations.
Elementary books just introduce circuit elements and signals etc and not touching the subject
of figuring out how complex networks work...